[CTuA11C] Thin-film LN and AlN Devices

[CTuA11C-05] High-Efficiency Overlay Grating Fiber-Chip Couplers for Aluminum nitride-on-Sapphire Waveguide Platform

*Shreelakshmi KP¹, Srinivasan Raghavan ¹, Shankar Kumar Selvaraja¹ (1. Indian Institute of Science (India))

[Presentation Style] Onsite

Fiber-chip grating couplers in AlN-on-Sapphire platform with a coupling efficiency of -5.5 dB/coupler is demonstrated, best reported so far. This enables the development of possible strategies to harness nonlinear photonics with the AlN platform.